Which of the following are energy-efficient measures commonly used in Japanese residential buildings
Which of the following are energy-efficient measures commonly used in Japanese residential buildings? (Select all that apply)
A. Exterior wall insulation
B. Double-glazed windows
C. Solar water heaters
D. Natural ventilation systems
E. Single-layer roofing
Answer: ABCD
Explanation: Exterior insulation, double-glazed windows, solar water heaters, and natural ventilation are common energy-efficient measures in Japanese residential buildings. Single-layer roofing (E) reduces energy efficiency by increasing heat transfer.

